Transform uneaten food into fertilizer with a machine that intakes food waste, mixes it with rainwater that is collected and fed into it, and thereby is able to transform what would have been garbage into high-grade fertilizer that is immediately ready for sale in the agricultural sector. The biogas produced by the composting process is used to power the machine itself.

References:

• https://simpleflying.com/pittsburgh-international-airport-food-waste-fertilizer/